ADV7180WBSTZ datasheet(78/120 Pages) AD

78 / 120 page

ADV7180

Data Sheet

Rev. E | Page 78 of 120

The MPU can write to or read from all of the ADV7180 registers

except the subaddress register, which is write only. The subaddress

accesses. All communications with the part through the bus start

with an access to the subaddress register. A read/write operation is

then performed from or to the target address, which increments

to the next address until a stop command on the bus is performed.

The following sections describe the configuration for each

operation is selected, the subaddress is set up. The subaddress

takes place. Table 105 lists the various operations under the

control of the subaddress register for the control port.

SUB_USR_EN, Address 0x0E[5]

This bit splits the register map at Register 0x40.

COMMON I2C SPACE

ADDRESS 0x00

≥ 0x3F

ADDRESS 0x0E BIT 5 = 0b

ADDRESS 0x0E BIT 5 = 1b

I2C SPACE

ADDRESS 0x40

≥ 0xFF

I2C SPACE

ADDRESS 0x40

≥ 0x9C

USER MAP

USER SUB MAP

NORMAL REGISTER SPACE

INTERRUPT AND VDP REGISTER SPACE

Figure 53. Register Access—User Map and User Sub Map

These bits are set up to point to the required starting address.

I2C SEQUENCER

An I2C sequencer is used when a parameter exceeds eight bits

and is therefore distributed over two or more I2C registers, for

example, HSB[10:0].

When such a parameter is changed using two or more I2C write

operations, the parameter may hold an invalid value for the

time between the first I2C being completed and the last I2C

being completed. In other words, the top bits of the parameter

may hold the new value while the remaining bits of the parameter

still hold the previous value.

To avoid this problem, the I2C sequencer holds the updated bits

of the parameter in local memory, and all bits of the parameter

are updated together once the last register write operation has

completed.

The correct operation of the I2C sequencer relies on the following:

•

All I2C registers for the parameter in question must be

written to in order of ascending addresses. For example, for

HSB[10:0], write to Address 0x34 first, followed by 0x35,

and so on.

•

No other I2C can take place between the two (or more) I2C

writes for the sequence. For example, for HSB[10:0], write to

Address 0x34 first, immediately followed by 0x35, and so on.

ADV7180WBSTZ Datasheet(PDF) 78 Page - Analog Devices

ADV7180WBSTZ Datasheet(HTML) 78 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL